Low-cost synthesis of high quality graphene oxide with large electrical and thermal conductivities
| Autor: | Shalik Ram Joshi, Jaekyo Lee, Gun-Ho Kim |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Oxide chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Crystal symbols.namesake chemistry.chemical_compound X-ray photoelectron spectroscopy Electrical resistivity and conductivity law General Materials Science Thin film Graphene Mechanical Engineering 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Chemical engineering Mechanics of Materials symbols 0210 nano-technology Raman spectroscopy Carbon |
| Zdroj: | Materials Letters. 292:129649 |
| ISSN: | 0167-577X |
| Popis: | A simple and cost-effective method for synthesizing high quality thermally reduced graphene oxide (TrGO) thin films using Shellac, is presented. The synthesis temperature ranges from 550 °C to 900 °C, and is the sole control parameter to obtain a carbon content as high as 97 atomic percentage. For TrGO synthesized at 900 ˚C, its XPS, Raman, and TEM data indicate a large portion of sp2 hybridized carbon atoms and large crystal sizes (~1 µm), which resulted in very high electrical and cross-plane thermal conductivities, 2488 S/cm and 1.3 W/m-K, respectively. Furthermore, this high electrical conductivity of TrGO was observed to remain unaffected under mechanical stress 10 times higher than that completely broke solution-processed reduced graphene oxide (rGO) films, promising its potential for robust, transparent, and cost-effective conductive coating. |
| Databáze: | OpenAIRE |
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